The development of artificial systems capable to mimic the human body rise fascinating problems r... more The development of artificial systems capable to mimic the human body rise fascinating problems regarding its capability of manipulating things. In order to obtain a human hand prosthesis easy to use, light and cosmetically appealing, one have to study the natural hand and to obtain its kinematical model. Also, the dynamic modeling of the human hand is necessary because its normal physiological motions require dynamics. The human hand is a mechanism having many degrees of freedom, so the obtained system of differential equations, modeling the hand, is very complex and imposes a numerical solution. These models can be used as a solid base to design satisfactory human hand prostheses. The paper presents a dynamical model of the human hand used to create a hydraulically based design for a human hand prosthesis.
One of the major problems in medical life is setting the diagnosis. A lot of applications tried t... more One of the major problems in medical life is setting the diagnosis. A lot of applications tried to help human experts, offering a solution. This paper describes how artificial neural networks (compared with other systems from artificial intelligence) can improve this domain.
The study of the human hand can offer interesting solutions for the human hand prosthesis develop... more The study of the human hand can offer interesting solutions for the human hand prosthesis development or in fields like computer animation or gesture recognition. The model presented in this paper is an anatomical one, having the same elements and the same motions. The model is developed using SimMechanics and is submitted to the constraints of the natural model.
In order to promote the osteosynthesis of a fractured bone, the complete immobilization of the fr... more In order to promote the osteosynthesis of a fractured bone, the complete immobilization of the fracture is needed. The surgical plates used have to respond accordingly to forces and deformations which can appear during daily activities or during stress conditions. Nowadays, finite element models are used to design implants, analyze the influence of different factors such as, size, shape, position, elastic modulus, etc. or to study bone variables, such as, geometry, bone density and anisotropy distributions and response to different load conditions. Following this trend, the paper presents a numerical analysis, using Finite Elements Method, of LN 331 S plate stress and deformation when reduces a parietal bone fracture.
The development of human hand prosthesis, which can imitate the human hand motion capabilities, i... more The development of human hand prosthesis, which can imitate the human hand motion capabilities, is a very important research field in order to conceive the prosthetic devices. The first step in the process of obtaining a better hand prosthesis is the modeling one. The human hand and the fingers represent highly articulated systems submitted to natural anatomical restrictions. To model the fingers joints and links, the kinematic chain of each finger should be represented. This paper presents the kinematic model of the middle finger as part of the human hand as well as, the orientations and the origin position of the reference frame attached to the specified fingertip.
2011 6th IEEE International Symposium on Applied Computational Intelligence and Informatics (SACI), 2011
Intelligent machining means a blend between machining processes (turning, milling, drilling, grin... more Intelligent machining means a blend between machining processes (turning, milling, drilling, grinding) and sensors, intelligent monitored by hardware and software applications dedicated to this task. From hardware point of view, today the sensors are incorporated by default in all machining equipments, but the intelligence is mostly human. Further researches try to replace the human decisions with artificial intelligence. This work
2009 5th International Symposium on Applied Computational Intelligence and Informatics, 2009
Accidents can cause fractures of facial or cranial bones. In many cases, those fractures can only... more Accidents can cause fractures of facial or cranial bones. In many cases, those fractures can only be treated through a surgical procedure and with the help of facial implants, because the complex and irregular anatomy of the face does not allow for an easy reduction to initial position of those bones. The face it is what defines us most, many
28th International Spring Seminar on Electronics Technology: Meeting the Challenges of Electronics Technology Progress, 2005., 2005
We developed an original rapid prototyping tool, named Comp-U-Craft, having a precision of 2.5·10... more We developed an original rapid prototyping tool, named Comp-U-Craft, having a precision of 2.5·10 -4 inches, a footprint comparable to a small office laser printer, and a capability to process large objects compared to the size of the machine. We started this mostly because there are only a few companies in the world, capable to manufacture facial implants, but not
The researchers all over the world give a lot of attention to modeling the human hand in order to... more The researchers all over the world give a lot of attention to modeling the human hand in order to obtain good hand prosthesis. Despite many attempts, very few solutions are available on the market, and even those are far too expensive to reach for most of the patients. Knowing that it is very important to have a model as close as possible to the natural one, we determined the kinematical and dynamical models of the human hand. We realized, also, that if we limit our model's capabilities to the most important function of the hand, namely prehension, considering that the vast majority of potential patients have one good hand for delicate ac- tions, then we can much quickly obtain an affordable human hand prosthesis with grabbing capabilities, to help impaired people to manage through most of the daily activities.
... 11. George ElKoura , Karan Singh, Handrix: animating the human hand, Proceedings of the 2003 ... more ... 11. George ElKoura , Karan Singh, Handrix: animating the human hand, Proceedings of the 2003 ACM SIGGRAPH/Eurographics symposium on Computer animation, July 26-27, 2003, San Diego, California. ... 16. D. Dragulescu, L. Ungureanu,&A. ...
28th International Spring Seminar on Electronics Technology: Meeting the Challenges of Electronics Technology Progress, 2005., 2005
We developed an original rapid prototyping tool, named Comp-U-Craft, having a precision of 2.5·10... more We developed an original rapid prototyping tool, named Comp-U-Craft, having a precision of 2.5·10 -4 inches, a footprint comparable to a small office laser printer, and a capability to process large objects compared to the size of the machine. We started this mostly because there are only a few companies in the world, capable to manufacture facial implants, but not
The researchers all over the world give a lot of attention to modeling the human hand in order to... more The researchers all over the world give a lot of attention to modeling the human hand in order to obtain good hand prosthesis. Despite many attempts, very few solutions are available on the market, and even those are far too expensive to reach for most of the patients. Knowing that it is very important to have a model as close as possible to the natural one, we determined the kinematical and dynamical models of the human hand. We realized, also, that if we limit our model's capabilities to the most important function of the hand, namely prehension, considering that the vast majority of potential patients have one good hand for delicate ac- tions, then we can much quickly obtain an affordable human hand prosthesis with grabbing capabilities, to help impaired people to manage through most of the daily activities.
The first step to create a functional and adjustable end effector, based on the human hand, is to... more The first step to create a functional and adjustable end effector, based on the human hand, is to conceive the architecture of the system, as well as its motion functions able to reflect the original ones. If the model is created with accuracy by respecting the nature of articulations and the dimensions of articulated bones, it can function as the real organ providing the same motions. Unfortunately, the human hand is hard to model due to its kinematical chains submitted to motion constraints. On the other hand, if an application does not impose a fine manipulation it is not necessary to create a model as complex as the human hand is. But anyway, the end effector has to perform a certain lot of motions in imposed workspace. The motion of the model was studied using MATLAB 7.0 in order to represent the hyper surface covering its own active workspace. To compare the fingers' tips trajectories, various possible simplified hand motions have been studied by acting only some of the mo...
The development of artificial systems capable to mimic the human body rise fascinating problems r... more The development of artificial systems capable to mimic the human body rise fascinating problems regarding its capability of manipulating things. In order to obtain a human hand prosthesis easy to use, light and cosmetically appealing, one have to study the natural hand and to obtain its kinematical model. Also, the dynamic modeling of the human hand is necessary because its normal physiological motions require dynamics. The human hand is a mechanism having many degrees of freedom, so the obtained system of differential equations, modeling the hand, is very complex and imposes a numerical solution. These models can be used as a solid base to design satisfactory human hand prostheses. The paper presents a dynamical model of the human hand used to create a hydraulically based design for a human hand prosthesis.
One of the major problems in medical life is setting the diagnosis. A lot of applications tried t... more One of the major problems in medical life is setting the diagnosis. A lot of applications tried to help human experts, offering a solution. This paper describes how artificial neural networks (compared with other systems from artificial intelligence) can improve this domain.
The study of the human hand can offer interesting solutions for the human hand prosthesis develop... more The study of the human hand can offer interesting solutions for the human hand prosthesis development or in fields like computer animation or gesture recognition. The model presented in this paper is an anatomical one, having the same elements and the same motions. The model is developed using SimMechanics and is submitted to the constraints of the natural model.
In order to promote the osteosynthesis of a fractured bone, the complete immobilization of the fr... more In order to promote the osteosynthesis of a fractured bone, the complete immobilization of the fracture is needed. The surgical plates used have to respond accordingly to forces and deformations which can appear during daily activities or during stress conditions. Nowadays, finite element models are used to design implants, analyze the influence of different factors such as, size, shape, position, elastic modulus, etc. or to study bone variables, such as, geometry, bone density and anisotropy distributions and response to different load conditions. Following this trend, the paper presents a numerical analysis, using Finite Elements Method, of LN 331 S plate stress and deformation when reduces a parietal bone fracture.
The development of human hand prosthesis, which can imitate the human hand motion capabilities, i... more The development of human hand prosthesis, which can imitate the human hand motion capabilities, is a very important research field in order to conceive the prosthetic devices. The first step in the process of obtaining a better hand prosthesis is the modeling one. The human hand and the fingers represent highly articulated systems submitted to natural anatomical restrictions. To model the fingers joints and links, the kinematic chain of each finger should be represented. This paper presents the kinematic model of the middle finger as part of the human hand as well as, the orientations and the origin position of the reference frame attached to the specified fingertip.
2011 6th IEEE International Symposium on Applied Computational Intelligence and Informatics (SACI), 2011
Intelligent machining means a blend between machining processes (turning, milling, drilling, grin... more Intelligent machining means a blend between machining processes (turning, milling, drilling, grinding) and sensors, intelligent monitored by hardware and software applications dedicated to this task. From hardware point of view, today the sensors are incorporated by default in all machining equipments, but the intelligence is mostly human. Further researches try to replace the human decisions with artificial intelligence. This work
2009 5th International Symposium on Applied Computational Intelligence and Informatics, 2009
Accidents can cause fractures of facial or cranial bones. In many cases, those fractures can only... more Accidents can cause fractures of facial or cranial bones. In many cases, those fractures can only be treated through a surgical procedure and with the help of facial implants, because the complex and irregular anatomy of the face does not allow for an easy reduction to initial position of those bones. The face it is what defines us most, many
28th International Spring Seminar on Electronics Technology: Meeting the Challenges of Electronics Technology Progress, 2005., 2005
We developed an original rapid prototyping tool, named Comp-U-Craft, having a precision of 2.5·10... more We developed an original rapid prototyping tool, named Comp-U-Craft, having a precision of 2.5·10 -4 inches, a footprint comparable to a small office laser printer, and a capability to process large objects compared to the size of the machine. We started this mostly because there are only a few companies in the world, capable to manufacture facial implants, but not
The researchers all over the world give a lot of attention to modeling the human hand in order to... more The researchers all over the world give a lot of attention to modeling the human hand in order to obtain good hand prosthesis. Despite many attempts, very few solutions are available on the market, and even those are far too expensive to reach for most of the patients. Knowing that it is very important to have a model as close as possible to the natural one, we determined the kinematical and dynamical models of the human hand. We realized, also, that if we limit our model's capabilities to the most important function of the hand, namely prehension, considering that the vast majority of potential patients have one good hand for delicate ac- tions, then we can much quickly obtain an affordable human hand prosthesis with grabbing capabilities, to help impaired people to manage through most of the daily activities.
... 11. George ElKoura , Karan Singh, Handrix: animating the human hand, Proceedings of the 2003 ... more ... 11. George ElKoura , Karan Singh, Handrix: animating the human hand, Proceedings of the 2003 ACM SIGGRAPH/Eurographics symposium on Computer animation, July 26-27, 2003, San Diego, California. ... 16. D. Dragulescu, L. Ungureanu,&A. ...
28th International Spring Seminar on Electronics Technology: Meeting the Challenges of Electronics Technology Progress, 2005., 2005
We developed an original rapid prototyping tool, named Comp-U-Craft, having a precision of 2.5·10... more We developed an original rapid prototyping tool, named Comp-U-Craft, having a precision of 2.5·10 -4 inches, a footprint comparable to a small office laser printer, and a capability to process large objects compared to the size of the machine. We started this mostly because there are only a few companies in the world, capable to manufacture facial implants, but not
The researchers all over the world give a lot of attention to modeling the human hand in order to... more The researchers all over the world give a lot of attention to modeling the human hand in order to obtain good hand prosthesis. Despite many attempts, very few solutions are available on the market, and even those are far too expensive to reach for most of the patients. Knowing that it is very important to have a model as close as possible to the natural one, we determined the kinematical and dynamical models of the human hand. We realized, also, that if we limit our model's capabilities to the most important function of the hand, namely prehension, considering that the vast majority of potential patients have one good hand for delicate ac- tions, then we can much quickly obtain an affordable human hand prosthesis with grabbing capabilities, to help impaired people to manage through most of the daily activities.
The first step to create a functional and adjustable end effector, based on the human hand, is to... more The first step to create a functional and adjustable end effector, based on the human hand, is to conceive the architecture of the system, as well as its motion functions able to reflect the original ones. If the model is created with accuracy by respecting the nature of articulations and the dimensions of articulated bones, it can function as the real organ providing the same motions. Unfortunately, the human hand is hard to model due to its kinematical chains submitted to motion constraints. On the other hand, if an application does not impose a fine manipulation it is not necessary to create a model as complex as the human hand is. But anyway, the end effector has to perform a certain lot of motions in imposed workspace. The motion of the model was studied using MATLAB 7.0 in order to represent the hyper surface covering its own active workspace. To compare the fingers' tips trajectories, various possible simplified hand motions have been studied by acting only some of the mo...
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